Film mount



May 3, 1958 P. s. KIEHL ETAL 2,834,136

FILM MOUNT Original Filed March 15, 1948 United States Patent FILM MOUNTPaul G. Kiehl, St. Louis, and William H. Kolath, In, Kirkwood, M0.

Original application March 15, 1948, Serial No. 15,004, now Patent No.2,659,992, dated November 24, 1953. Divided and this application October30, 1953, Serial No. 389,374

Claims. (Cl. 40--159) The present invention relates generally to bindersfor slides for projection machines, and the like, and more particularlyto a plastic slide binder. The present application is a division of ourapplication Serial No. 15,004, filed March 15, 1948, and which on Nov.24, 1953 was issued as Patent No. 2,659,992.

An object of the present invention is to provide a novel plastic slidebinder which is adapted to hold and seal a transparency, such as a filmor other object suitable for mounting, against dust and other foreignmatter.

Another object is to provide a novel plastic slide binder which isformed to prevent scarring of the face of the binder in order to insurelong life of the device. It is 7 well known that scratches on plasticmaterial reduce the transmission of light therethrough, which will, ofcourse, result in marring the image of the film contained within theplastic binder when projected.

Another object is to provide a novel plastic slide binder which isformed of a pair of identical halves, and which incorporates open endsfor the ready insertion of a slide mask and a contained film.

Another object is to provide a novel transparency mask which is formedto readily receive a film, or the like.

Other objects are to provide a novel plastic slide binder which isinexpensive, which is readily assembled, which is long lasting, which isproof against breakage either in use or in shipment, and which isadapted to fulfill the advantages set forth therefor.

Other objects and advantages are apparent from the following descriptiontaken with the accompanying drawings, in which:

Fig. l is a view of a film mask shown in extended unfolded position;

Fig. 2 is an isometric view of the mask in partially folded position;

Fig. 3 is a front view of a plastic slide binder embodying the teachingsof the present invention;

Fig. 4 is an enlarged cross-sectional view on substantially the line 4-4of Fig. 3;

Fig. 5 is an enlarged cross-sectional view on substantially the line 5-5of Fig. 3; and

Fig. 6 is an isometric view of the inner surface of one of the identicalmembers forming the binder of Fig. 3.

For ease of cross reference, the same reference numerals used in theparent application are employed here to designate like parts andassemblies.

Referring to the drawings more particularly by reference numerals, 50indicates generally a plastic slide binder incorporating the teachingsof the present invention (Figs. 3-6). The binder 50 is made of clearplastic, such as polystyrene, lucite, or other plastics.

Within the binder 50 is a film mask (Figs. 1, 2, 4, and 5) which holds afilm 36 positioned to be substantially framed by the central inset outersurfaces.

The film mask 35 is formed of thin flexible material, such as paper, orthe like, and preferably includes a ice central portion 38 and endportions 39 and 40 (Figs. 1 and 2). The central portion 38 and the endportion 40 have central openings or cutouts 41 of the size of the filmportion to be projected. A central opening or cutout 42 of larger sizeis provided in the portion 39. Glue may be applied to one side of themask 35, as shown, or other sealing means, such as interlockingperforations, heat or friction sealing means, or the like, may be used.The portion 39 is folded about the line 43 into contiguous relationshipwith the portion 38 after the glue on the portion 39 is moistened.Thereafterwards, the portion 40 is folded about the line 44 to engagehalf of the portion 40 with the portion 39 after the portion 40 has beenfolded about the interrupted center line 45. A portion of the glue onthe portion 40 is dampened in order to engage the portion 39 withoutengaging the portion 38. It will be appreciated that there is thusprovided a pocket defined by the glued half of the portion 40 and thefacing half of the portion 38 which is of a width equal to the thicknessof the portion 39 which lies therebetween. The film 36 may be slippedinto the pocket thus formed and thereafterwards secured in position bymoistening the outer area of the free half of the portion 40 and placingit against the portion 39. The film 36 will be trapped between theportions 38 and 40 and will be disposed within the cutout of the portion39.

In Figs. 3 through 6 is shown the plastic slide binder 56 which includesa pair of opposed identical members 52. Each member 52 is of the formclearly shown in the drawings, and includes a central outer inset face53, a planar inner surface 54, a flange 55 along one edge, a shoulder 56along the opposite edge, a wall 57 along a third edge which slopes intothe surface 54, and a fourth edge 58 which is convex in cross section,as is clear from Fig. 4. A shoulder 59 is formed at the inner reach ofthe edge 58.

Figs 4 and 5 show the binder 50 enclosing a mask 35 and film 36, beingsealed along two edges. It is manifest that the portion of the film 36to be projected is substantially framed by the central outer insetsurfaces 53. It is also clear from these views that the flange 55 of onemember 52 engages the shoulder 56 of the other, and that the wall 57 ofone member 52 overlies the edge 58 of the other (Fig. 4). Hence, twoslots 60 are provided for the insertion and removal of the mask 35 andits enclosed film 36. The shoulders 59 retain the mask 35 in place.

It is apparent that there has been provided a plastic slide binder whichfulfills the objects and advantages sought therefor.

It is to be understood that the foregoing description and theaccompanying drawing have been given by way of illustration and example.It is also to be understood that changes in form of the elements,rearrangement of parts, and substitution of equivalent elements, whichwill be obvious to those skilled in the art, are contemplated as withinthe scope of the present invention which is limited only by the claimswhich follow.

What is claimed is:

l. A component member of a slide binder including a transparent panelhaving a continuous planar inner surface bounded by four edges, 21 rightangularly extending flange extending continuously along one edge of saidinner surface, a shoulder extending continuously along the oppositeedge, a wall extending continuously along a third edge of said innersurface having a concave inner surface, and a wall extendingcontinuously along the fourth edge of said inner surface having a convexinner surface.

2. A component member of a slide binder including a transparent panelhaving a continuous planar inner surface bounded by four edges, a rightangularly extending flange extending continuously along one edge of saidinner surface, a shoulder extending continuously along the oppositeedge, a wall extending continuously along a third edge of said innersurface having a concave inner surface, and a wall extendingcontinuously along the fourth edge of said inner surface having a convexinner surface, said wall extending continuously along the fourth edgeextending above said planar inner surface and forming a continuousshoulder against which a mask and film are adapted to abut.

3. A slide binder comprising two substantially identical members formedfrom plastics, each member including 'a transparent panel having acontinuous planar inner surface bounded by four edges, a right angularlyextending flange along one edge of said inner surface, a shoulder alongthe opposite edge, a wall along a third edge of said inner surfacehaving aconcave inner surface, and a wall along the fourth edge of saidinner surface having a convex inner surface complementary with saidconcave inner surface.

4. A slide binder comprising two substantially identical members formedfrom plastics, each member including a transparent panel having acontinuous planar inner surface bounded by four edges, a right angularlyextending flange along one edge of said inner surface, a shoulder alongthe opposite edge, a wall along a third edge of said inner surfacehaving a concave inner surface, and a wall along the fourth edge of saidinner surface having a convex inner surface, said wall along the fourthedge extending above said planar inner surface and forming a shoulderagainst which a mask and film are adapted to abut the shoulder of one ofthe identical members being abutted with the flange of the other, andthe convex inner surface of one of the identical members being disposedin spaced relation to the roncave inner surface of the other.

5. A slide binder comprising two substantially identical members formedfrom-plastics, each member including a transparent panel having acontinuous planar inner surface bounded by four edges, a right angularlyextending flange along one edge of said inner-surface, a shoulder alongthe opposite edge, a wall along a third edge of said inner surfacehaving a concave inner surface, and a wall along the fourth edge of saidinner surface having a convex inner surface, each of said convexsurfaces cooperating with one of said concave surfaces to define opposedslots for removably inserting a film or 'the like between saidtransparent panels.

References Cited in the file of this patent UNITED STATES "PATENTS2,390,053 Bradford Dec. 4, 1945 2,401,598 Wood June 4, 1946 2,505,250Kems Apr. 25, 1950 2,511,651 Schlitz June 13, 1950 2,572,735 Kugel Oct.23, 1951 2,596,667 Ewald May 13, 1952 FOREIGN PATENTS 25,929 GreatBritain Nov. 17, 1906 707,500 Germany June 24, 1941

